package com.yinzifan.security.core.validate.code.image;

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.util.Random;

import org.springframework.web.bind.ServletRequestUtils;
import org.springframework.web.context.request.ServletWebRequest;

import com.yinzifan.security.core.properties.SecurityProperties;
import com.yinzifan.security.core.validate.code.ValidateCode;
import com.yinzifan.security.core.validate.code.ValidateCodeGenerator;

//@Component
public class ImageCodeGenerator implements ValidateCodeGenerator{
	private SecurityProperties securityProperties;
	
	@Override
	public ValidateCode generate(ServletWebRequest request) {

		int height = ServletRequestUtils.getIntParameter(request.getRequest(), "height", securityProperties.getCode().getImage().getHeight());
		int width = ServletRequestUtils.getIntParameter(request.getRequest(), "width", securityProperties.getCode().getImage().getWidth());
		int length= ServletRequestUtils.getIntParameter(request.getRequest(), "length", securityProperties.getCode().getImage().getLength());
		int expireIn = ServletRequestUtils.getIntParameter(request.getRequest(), "expireIn", securityProperties.getCode().getImage().getExpireIn());
		BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
		Graphics g = image.getGraphics();
		Random random = new Random();
		g.setColor(getRandColor(200, 250));
		g.fillRect(0, 0, width, height);
		g.setFont(new Font("Times New Roman", Font.ITALIC, 20));
		g.setColor(getRandColor(160, 200));
		for(int i = 0; i< 155; i++) {
			int x = random.nextInt(width);
			int y = random.nextInt(height);
			int xl = random.nextInt(12);
			int yl = random.nextInt(12);
			g.drawLine(x, y, x + xl, y + yl);
		}
		String sRand = "";
		for(int i = 0; i< length; i++) {
			String rand = String.valueOf(random.nextInt(10));
			sRand += rand;
			g.setColor(new Color(
					20 + random.nextInt(110),
					20 + random.nextInt(110), 
					20 + random.nextInt(110)
					));
			g.drawString(rand, 13 * i + 6 , 16);
		}
		g.dispose();
		return new ImageCode(image, sRand, expireIn);
	}

	private Color getRandColor(int fc, int bc) {
		Random random = new Random();
		if(fc > 255) {
			fc = 255;
		}
		if(bc > 255) {
			bc = 255;
		}
		int r = fc + random.nextInt(bc - fc);
		int g = fc + random.nextInt(bc - fc);
		int b = fc + random.nextInt(bc - fc);
		return new Color(r, g, b);
	}

	public SecurityProperties getSecurityProperties() {
		return securityProperties;
	}

	public void setSecurityProperties(SecurityProperties securityProperties) {
		this.securityProperties = securityProperties;
	}

}
